Carbon build up inside intake bores?

So it sounds like the carbon buildup in the intake ports was a common issue. Not sure what I’m gonna do, kind of bummed out right now. Thought I was gonna do a relatively simple fun intake switch & turned into a major cluster F project & $’s I wasn’t planning for.
Thx for all the valuable info!
 
Questions on reinstalling heads. Can I reuse the head bolts? Whats the best sealer product for the head bolt threads where they need to seal from water jacket?
 
Headbolts can be reused if they wasn´t abused being overtorqued.
Sealant is like flavour of icecream...we all have our favourite...i use loctite threadsealer...permatex or any pipethread sealer should do the job...
 
So I’m not gonna pull the guides out, but I am gonna stop compression braking per Lawrie! But I got an idea after seeing a video on which is better Seafoam or Mystic to clean carbon by poring into carb. He took carboned up valves & put them in a jar of each & both dissolved the carbon! As I have the problem cyl. bdsank opened w head off & see the carbon in the ports I think I can pour / puddle some in each port to dissolve carbon then suck out w shop vac? What do u think?
 
Looks like good stuff. The Seafoam sitting in the ports and the head chambers for 3 days did pretty much the same thing. Although that video using Chem-dip is pretty amazing & I'lll add to my arsenal of cleaning fluids especially for carbon build up. it looks to be significantly faster reaction than the Seafoam!
 
Would not doing anything be an option? Was it really causing a problem? You know what it is and it shouldn't really cause a problem, (or have I missed that?) so why not just leave it alone?

Just giving the alternative viewpoint.

Mart.
 
I can tell you from experience it WILL cause a problem.
On the 33 original babbit engine that we used in the 33 for a long time.
I had it rebuilt but used the best old valves and guides.(dumb)
We we to a national rally that was 1000 miles each way.
On the way home the engine got a little bit rough.not much but not as smooth as usual.
When we got home I parked it in the shed ,commenting how well it went on the trip.
the next week I started it up and promply turned it off,It sounded like it had hammers tied to the crankshaft,
I thought it had some of the sleeves (it was sleeved back to standard) come loose.
I took the engine out and just heaved it under the bench and fitted another spare engine .
Some months later I took the heads off the babbit engine to have a look,the tops of the pistons were all carboned up as well as the head,and the pistons hit this carbon and thats what the noise was.
I later I cleaned it off,fitted new straight valves and guides with seals on the inlet and reused this engine for a long time,it is still the smoothest one I have.
Lawrie
 
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